Rachel Frederickson's dramatic weight loss has been the topic of heated conversation since "The Biggest Loser" finale aired on Tuesday (Feb. 4). Frederickson, 24, won Season 15 of the NBC show, and dropped 155 pounds, which was 59.62 percent of her original body weight. On Wednesday, one of her trainers, Dolvett Quince, posted a message on his Facebook, and spoke about her transformation.

Frederickson turned heads -- literally -- when she walked on stage at "The Biggest Loser" finale and viewers immediately noticed that trainers Bob Harper and Jillian Michaels looked shocked. Michaels could be seen mouthing "Oh my God" over and over. Harper responded on Twitter and wrote, "Jillian and I want to take a moment to congratulate all of the BL contestants on their hard work. We're not comfortable commenting on Rachel's journey because we weren't her trainers and weren't given an opportunity to work with her at any point."

UPDATE: NBC and Shine America said, in a statement to the Huffington Post, "We support Rachel and all of the Biggest Loser contestants who have shared their journeys over the past 15 seasons. We remain committed to helping contestants achieve healthy weight loss and live healthier lifestyles, and to inspiring viewers to do the same."

See Frederickson's transformation below.

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NBC's New Shows 2013-2014

NBC's New Shows 2013-2014

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"Ironside"

In the gritty world of the NYPD, no one’s tougher than Det. Robert Ironside (Blair Underwood, “The Event,” “In Treatment”). He’s a fearless cop who won’t stop until the guilty are brought to justice. He and his trusted, handpicked team of specialists — Virgil (Pablo Schreiber, “The Wire” “Lights Out”), Holly (Spencer Grammer, “Greek,” “As the World Turns”) and Teddy (Neal Bledsoe, “Smash,” “Ugly Betty”), as well as his former partner Gary (Brent Sexton, “The Killing”) and boss, Det. Ed Rollins (Kenneth Choi, “Sons of Anarchy”) — will do whatever it takes to solve New York’s most difficult and notorious crimes. As a detective, Ironside’s instincts are second to none, and those around him have to stay on their toes if they want to keep up because when his spine was shattered by a bullet two years ago, Ironside swore he’d never let a wheelchair slow him down.